Depending on the processed material from each drill must be properly sharpened. To verify the correct angle will help a specially prepared square plate of copper or aluminium with a thickness of 1 mm.
To become operational protractor enough to cut it cut, as shown in the picture: a large cutout at an angle of 120 degrees, the other half is 60 degrees and the surviving corner of a square is 90.
Recommend to read
“WIND” FROM A CANISTER
Nowadays, you can buy any tool, any mechanism. However, all of this costs a considerable amount of money. For the maintenance needs of the technical school where I teach, a compressor...
BOAT-BAUL
Among the boats built by Amateurs for their own projects, occupy a special place, as we now say, a "mini-design". To them, undoubtedly, belongs and the boat is"baby", created by our...
